Looked at logs along with Harald, few observation:-


* Ansible failed for controller-0 - 2022-05-10 06:13:37.289975 [1] around same there was a network related logs on controller, suspecting if legacy network service is causing a blipp[2]
* cloud-init was still running and by the time ansible failed, As per the logs - cloud-init is creating the heat-admin user after the ansible login failure [3]


[1]

https://logserver.rdoproject.org/openstack-periodic-integration-main/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-9-ovb-1ctlr_2comp-featureset020-master/69a4390/logs/undercloud/home/zuul/overcloud_node_provision.log.txt.gz


~~~
2022-05-10 06:13:28.960063 | fa163e8d-01ec-fe41-ce7a-00000000000f |       TASK | Find the growvols utility
[WARNING]: Unhandled error in Python interpreter discovery for host overcloud-
controller-0: Failed to connect to the host via ssh: ssh: connect to host
192.168.24.22 port 22: Connection refused
~~~

[2]

https://logserver.rdoproject.org/openstack-periodic-integration-main/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-9-ovb-1ctlr_2comp-featureset020-master/69a4390/logs/overcloud-controller-0/var/log/extra/journal.txt.gz

~~~
May 10 06:12:38 overcloud-controller-0 NetworkManager[1130]: <info>  [1652177558.7952] device (enp3s0): Activation: successful, device activated.
< ... >
May 10 06:13:23 overcloud-controller-0 NetworkManager[1130]: <info>  [1652177603.9559] dhcp4 (enp8s0): activation: beginning transaction (timeout in 45 seconds)
May 10 06:13:38 overcloud-controller-0 systemd[1]: NetworkManager-wait-online.service: Main process exited, code=exited, status=1/FAILURE
May 10 06:13:38 overcloud-controller-0 systemd[1]: NetworkManager-wait-online.service: Failed with result 'exit-code'.
May 10 06:13:38 overcloud-controller-0 systemd[1]: Failed to start Network Manager Wait Online.
May 10 06:13:38 overcloud-controller-0 systemd[1]: Starting LSB: Bring up/down networking...
May 10 06:13:38 overcloud-controller-0 network[1195]: WARN      : [network] You are using 'network' service provided by 'network-scripts', which are now deprecated.
May 10 06:13:38 overcloud-controller-0 network[1206]: You are using 'network' service provided by 'network-scripts', which are now deprecated.
May 10 06:13:38 overcloud-controller-0 network[1195]: WARN      : [network] 'network-scripts' will be removed from distribution in near future.
May 10 06:13:38 overcloud-controller-0 network[1207]: 'network-scripts' will be removed from distribution in near future.
May 10 06:13:38 overcloud-controller-0 network[1195]: WARN      : [network] It is advised to switch to 'NetworkManager' instead for network management.
May 10 06:13:38 overcloud-controller-0 network[1208]: It is advised to switch to 'NetworkManager' instead for network management.
May 10 06:13:38 overcloud-controller-0 NetworkManager[1130]: <info>  [1652177618.3949] audit: op="connections-reload" pid=1248 uid=0 result="success"
May 10 06:13:38 overcloud-controller-0 network[1195]: Bringing up loopback interface:  [  OK  ]
May 10 06:13:38 overcloud-controller-0 NetworkManager[1130]: <info>  [1652177618.5848] audit: op="connections-load" args="/etc/sysconfig/network-scripts/ifcfg-enp3s0" pid=1336 uid=0 result="success"
May 10 06:13:38 overcloud-controller-0 network[1195]: Bringing up interface enp3s0:  [  OK  ]
~~~


[3]

https://logserver.rdoproject.org/openstack-periodic-integration-main/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-9-ovb-1ctlr_2comp-featureset020-master/69a4390/logs/overcloud-controller-0/var/log/extra/journal.txt.gz

~~~
May 10 06:13:39 overcloud-controller-0 useradd[1493]: new user: name=heat-admin, UID=1000, GID=1001, home=/home/heat-admin, shell=/bin/bash, from=none
~~~